Significantly nearsighted people of any age can read without glasses, but vision of distant objects is blurred without glasses. Farsighted people first need glasses to read and then, as they age, also need glasses for clear distance vision.

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Eye diseases, which are common among adults and range from temporary to chronic and sight‐threatening, can be a result of genetics, injury, surgery or aging. You can lower your risk with a proper diet, wearing sun-protective lenses when outdoors and by seeing your doctor for regular exams.